On 28/03/14 08:35, Kay Diederichs wrote:
Am 28.03.14 08:44, schrieb Folmer Fredslund:
Hi Kay, Ethan and Dale,
I don't want to turn this into a "me too" thread, but I can confirm that
I also see this issue.
My system is a 64bit Ubuntu 12.04 kernel 3.11, with the HD3000 graphics
on an i7-2640M CPU.
As Ethan mentions, this is in the software stack somewhere.
so it could be the Linux i915 driver (including drm drm2 mesa and
whatnot), because this problem does not appear on Macs and Windows,
with the same hardware.
It does not seem to be coot's fault, but coot is what triggers it. On
the other hand, other programs do not seem to trigger the quirk on Linux.
Does coot use the same code for Linux/Mac/Windows?
Yes. All coot does is request a GL context and draw coloured lines to it
in immediate mode. About as simple as it can get.
For text, I use glutBitmapCharacter(). I am not against changing this
(but it is not clear to me at the moment what to use instead).
What I see on my hardware is that the CPU usage goes from 80% to 95%
during the Spin view as soon as I click an atom, and the fans start to
run (much) faster, and the battery drains much faster.
switching from hardware to software rendering, I'd imagine (this is not
under the control of coot (not directly, I mean)).
Paul.
